Home / 138,110.28-190,590.30-77,680.91

Finding the Fourth Proportional to 138,110.28, 190,590.30 and 77,680.91

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Solution

The fourth proportional to 138,110.28, 190,590.30 and 77,680.91 is: 107,198.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,110.28 : 190,590.30 = 77,680.91 : x
  2. Step 2: Convert to fraction form
    138,110.28/190,590.30 = 77,680.91/x
  3. Step 3: Cross multiply
    138,110.28x = 190,590.30 × 77,680.91
  4. Step 4: Simplify right side
    138,110.28x = 14,805,226,988.22
  5. Step 5: Solve for x
    x = 14,805,226,988.22/138,110.28
  6. Step 6: Final answer
    x = 107,198.59

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.